Sound-producing instrument.



F. GOTTSOHALK. SOUND PRODUCING INSTRUMENT.

APPLICATION FILED DEC. 23, 1907'.

Patented July 20, 1909.

INVENTOR,

WITNESSES.-

' ATTORNE whereby the waves are of such an instrument, of a device tectmg the same against atmospheric mflu- 3 inafter appear and the means for their at- I L claims.

7 'chanical featureskbut also on account of uninstruments, and l class thereof in a diaphragm issub- Contact the diaphragm,

FELIX GOTTSCHALK, on NEW YORK, 1v. Y.

UNITED SOUND PRODUCIN G INSTRUMENT.

Specification of Letters Patent. Patented July 20, 1909.

Application filed December 23, 1907. Serial No. 407,613.

pends principally up rf the concentration of the sound-waves on} a certain point, which should be as close as possible to the electrodes.

In applying my invention to a telephone transmitter, 'n the manner shown in the accompanying drawing,;I have produced a sensitive instrument; which experience has demonstrated as obviating the .objections existing heretofore moreover, the-tension of the diaphra m hasb'ee'n considerably increased, so t To all whom 'it may concern:

Be it known that I, FELIX Go'r'rsoHALn, a citizen of the United States of America, and resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Sound-Producing Instruments, of which the following is afu ll, clear, and exact description.

This invention relates to sound-producing more especially to that .jected to theacii Qfi" of sound-waves, such for natural vibration-speed 1s highenwhile at instance as tel phone transmitters, phonothe same time the'vibratioii-amount 15 lessraphs, and. er similar devices, and it has or one of ts ob ects the provision of means concentratedor d1- ened, and the action or modulation of the current due to the'resistance and co-action of the usual granulated carbon is consequently 'rected toward thecentralportion of the diamore rapid.

phragm. v /i I Referring to the drawings T denotes in a My invention has g furthermore, for its obgeneralway the transmitter of a telephone,

ject the combination, comprising a shell 10, and'a casing or cap 11 on which the several elements of the device are supported,

Secured tothe cap 1 1,is abridge 12, carrying a post 13, which carries the bottom electrode 14 and the top electrode 15 between which granulated carbon 16 is. disposed as usual. I

The electrode 15 carries, a screw-stud 17 and is attached to the diaphragm 18 which is supported on the .cap 11 but insulated therefrom.

Secured to the entering an aperture 11' mouth-piece 19. All the. parts knownin thc'art, and perform similar functions as heretofore.

with the dia hragm or proencesfyespecially 'n connection with tele hone 'transmitters in which the speakers reath' has thus far always comeinto direct this condition producing more or less moisture apt to cor rode or work other injury to the diaphragm. Further objects of theinvention will heretainment-will be particularly set forth in' the I front of the cap 11 and In the accompanyingdrawings, in which thereof, is the similar characters designate similar arts,-' Figure 1 represents a section of a te ephone transmitter embodyin my invention, and Fig. 2 illustrates a modification.

It is the aim of my present invention to obviate the many "objections and troubles which manifest themselves especially in telephone transmitters as constructed and generall used, notbnly in View of; their me of the present invention to concentrate the sound-waves at a certain point of the diaphragm, and I accomplish tlIISIQSUlt by attached to the diaphragm 18fbyl; ai nut 26 sanitary conditions arising fromthe speakon the screw-stud 17. This receiver'fis prefers breath as well as from the accumulation of dust on the diaphragm, the entire expanse of which has heretofore been exposed without affording any opportunity of cleansing the same. Furthermore, the fact that practically the entire surface of the diaphragm was thus permitted to be influenced by the soundrwaves, naturally tended to diffuse the force of the sound to cause vibration, a feahim which is important inasmuch as'the dis tinctness of the diaphragm-vibrations deedge 25 may contact with the inner surface the vibration of I ring to Fig. 1 it will be understood, that i the sound waves produced by a person speaking into the mouthpiece, will necessarily be inasmuch as the edge 25' of the receiver-cup It has been above stated that it is one ahn' means of cup-shaped receiver %5, closely I of the shell-cap 11 and yet not interfere with the diaphragm. By refer focused at the center of the diaphragm and at'in the present instance the thus far described, are well erably made of flexible material so that its moisture due to condensation, and against the accumulation of dust; and also, the cup 25 will act. as-a damper on the diaphragm, and prevent" excess in rattling thereof.

-By virtue of the fact that in the present instance the sound waves are "directed and confined to a small portion of the diaphragm, it is obvious that the large air space between the diaphragm-front and the inner surface of the casing-cap can be very much reduced,

only sufiieient room being required so as not to interfere with the. vibration of the diaphragm.

In Fig. 2, l have illustratcd'a modification, the cup 80 in this instance. being made of non-elastic material and held in the cap 11, while a bushing 31 or 'ashers of yielding material may be employed for forming a close union between the diaphragm and the cup.

Many changes may he made in the construction and organization of the several cooperative elements, Without departing from the spirit of the invention, and the latter may be advantageously applied to many other sound vices.

I. claim 1. The combination, with a casing having an a )erture. and a die ohra 'm su iorted by sai casing, of a device connected with said diaphragm and extending to said aperture and for concentratlng all of the sound Waves producing or trausmitting dc passing through said aperture, toward a certain point of said diaphragm.

2. The combination with a casing having an aperture, and a diaphragm carried by said casing, of a cup-shaped receiver contacting with the wall of said aperture and secured with its bottom portion the diaphragm.

3. The combination, with a diaphragm, an electrode carried thereby, and a casing for supporting said diaphragm and having an aperture, of a receiver-cup having its edge contacting with the walls of said aperture, and means for securing said electrode and diaphragm and receiver cup together.

4. The combination, with a diaphragm, an electrode carried thereby, and a casing for supporting said diaphragm and having an apcrlure. oi a receiver-win) having its edge contacting with the walls of said aperture, and means for yicldingly securing said electrode and diaphragm and reccivm' cup together. I

5. The combination, \vith a diaphragm, an electrode carried thereby, and a casing for supporting said diaphragm and having'an aperture. of a receiver cup extending from the diaphragm to the aperture, and yielding means for securing said cup to the diaphragm. I

tfiigned by me at New York, N. presence oi two subscribing witnesses.

FELIX GO'VISCHA LK.

Y., in

Witnesses:

Anninrr W. ZAcn.\ni.\s-,. 1 E. M. ZAcnAnus. 

